package main

import (
	"fmt"
)

//常量
const (
	PI   float64 = 3.14
	NUM  int64   = 2
	NAME string  = "json"
)

//变量
var (
	Pi   float64 = 3.14
	Num  int64   = 2
	Name string  = "json"
)

//定义结构
type Gopher struct {
}

//结构方法
func (gopher Gopher) Go() {

}

//定义 接口
type Writer interface {
}

//定义方法
func main() {
	fmt.Println("eeeee")
}
